I really like my BeQuiet Silent Wings 2. The 140's @ 1K RPM and the 120's up to 1200 RPM. No motor noise at all and no air noise. At full load folding 1 CPU and 2 GPU, water temp ~60c I get small amount of air noise, and I sleep like a baby.

I have a HAF-XB so there is no hiding noise behind panels or sound insulation.

Are they worth it for the price... Well you didn't ask that so I will move along.

I see a problem with the advertised dB ratings, I personally have a hearing disorder, being half deaf in my left ear due to a childhood accident with my brother, and I'm going deaf slowly in my right ear... I can hear a very few select frequencies, conveniently the annoying hums my cheap Bitfenix fans can emit at some points in time.

personally i define quiet by if i can fall asleep with it on. so... roughly the decibel level of an air vent for the central air conditioning running. or a mini fridge full of beer running (ok doesn't have to be full, depends on how thirsty i was that day )

personally i define quiet by if i can fall asleep with it on. so... roughly the decibel level of an air vent for the central air conditioning running. or a mini fridge full of beer running (ok doesn't have to be full, depends on how thirsty i was that day )

LOL for the beer thought on silence XD drink enough and anything will be quiet!